Electro-mechanical whistle



(No Model.)

H. B. COX.

ELEGTRO MECHANICAL WHISTLE.

No. 352,044. Patented N0 ,1886'.

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v is a full, clear, and exact description of the in- Theinduction-passage b of thecasing is of'the 5o ply-pipe E to the whistle.

UNITED vi STATESP TENT OFF 101e,; 1 1

HARRY efoox, or

CINCINNATI, OHIO.

ELECTRO-MECHANICAL WHISTLE.

SPECIFICATION forming part of Letters Patent No. 352,044, dated November2, 1886.

Application filed July 13, 1886. Serial No. 207.943. (No model.)

To all whom it may concern.-

Be it known that I, HARRY B. COX, of Oincinnati, in-the county ofHamilton and State of .Ohio, have invented certain new and usefulImprovements in Electro -Mechanical Whistles; andI do hereby declarethatthe following vention, which will enable others skilled in the art towhich it appertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of refer-- ence markedthereon, which form part of this specification.

My invention relates to whistles such as are used on locomotives,stationary and marine engines, fog-horns, and air-whistles; and it v hasfor its object to furnish a novel mechanism for operating such whistles.

With this object in view my invention consists in the improvedconstruction, arrangement, and combinationof parts hereinafter fullydescribed, and afterward specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective of thewhistle and operative mechanism complete. Fig. 2 is a view of the upperportion of the whistle, partly in section and partly in side elevation;and Fig. 3 is a view in side elevation of the valve-plug detached.

Like letters of reference mark the same parts in all the figures.

Referring to the drawings by letters, A is an ordinary steam orcompressed-air whistle, provided with a valve to admit the operativefluid. B is the casing of said valve, provided with an induction port orpassage, b. O is the valve-plug, fitted accurately in the casing B, andprovided with small ends a, which project through the packing-glands bof the casing B. The valve-plug is provided with an elongated slot ofsubstantially rectangular section.

same section. The eduction-passage 1), however, is of the ordinaryshape, being circular in section, and tapering to concentrate the fluidbefore reaching the whistle.

D is the supporting-upright, serving also as the pipe to conduct thesteam or air from supvalve-plug C, while their lower ends are pivotallysecured at f f to red G, which in their turn have a cross-bar, H,loosely pivoted in their outer ends, as at g 9. On the center of thecross-bar G is secured one end of an armature, I, which is pivoted inbrackets or lugs I, projecting from the support D, and at its oppositeend engages an electromagnet, J, the armature being kept normally in itsdisengaged position by a spring, 2', and being regulated as to extent ofthrow by a set-screw, t.

K K are-wires from the battery.

The mechanism is operated as follows, viz: The circuit being open, thearmature by virtue of the spring t will remain in its outer position atthe lower end, out of contact with the magnet J, in which position thevalve will be closed. To open the valve and sound the whistle,it is onlynecessary to close the circuit in any well-known manner, or by anysuitable circuit-closenwhen the electro-magnet,becommature to it, and asa consequence its upper end will be moved outward, which motion, throughthe medium of rods or links G and levers F, will turn the valve-plug sothat the induction-passage of the valveand the slot of the valve-plugwill coincide, thus allowing a free passage for the fluid to thewhistle. But a very small movement of the plug is necessary, due to theshape of the slot in it and the induction-passage. Thesebeingelongated,may be made very narrow without unnecessarily curtailing theirarea, and a movement of about one-eighth of a revolution will fully openor close the valve, whereas nearly a half-revolution would be necessarywith these openings of a circular area.

The special advantages claimed for this invention, of the combination ofvalve-whistle and electro-magnet, and the uses to which it isapplicable, are, first, if used in connection with an electric-bell cordor, signaling device on railroad trains, it has the advantage over anordinary electric gong in that the motion and jar of the train does notmake it jingle or tend to throw it out of order, as is invariably thecase with an electro-gong; second, if used as an alarm-signal on marineengines, it can be operated by a push-button from any part I F arelevers secured to the ends a c of ing active,will draw the lower end ofthe arof the vessel at which said button is located;

third, it gives, when used as above cited, a much clearerandloudersignal; fourth, when, as an alarm-signal on stationaryengines,pushbuttons may be placed at convenient places, and in case ofan accident to the machinery an instant and loud signal can begiven theengineer; fifth, its especial advantage is that when steam or compressedair can be used it gives a louder and clearer signal than can be made byany known contrivance operated by electro or electromechanical means.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In combination, a whistle, its valve havinga suitable casing withelongated ind uctionpassage and circular eduction port, and a valve-plugwith an opening corresponding in section with the induction-passage, asset forth.

HARRY B. COX.

Witnesses:

O. E. DUFFY, F. P. HARDING.

